v3.26.1
Shareholder Report, Average Annual Return (Details) 1014042_Franklin High Yield Corporate ETF_Single Class_TSR Annual {Single Class}
12 Months Ended 60 Months Ended 94 Months Ended
Mar. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Franklin High Yield Corporate ETF      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Franklin High Yield Corporate ETF (NAV)    
Average Annual Return, Percent 8.05% 4.64% 5.83%
Bloomberg U.S. Aggregate Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Index    
Average Annual Return, Percent 4.35% 0.31% 1.98%
ICE BofA U.S. High Yield Constrained Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name ICE BofA U.S. High Yield Constrained Index    
Average Annual Return, Percent 6.90% 4.20% 5.09%